[MEncoder-users] Adding harddup as an afterthought?

[Ilya Zakharevich]

I have several video files encoded with 

  set video_filter=-ofps 24000/1001 -vf pullup,softskip

As I discovered, my hardware player (Philips DVP5982) does not like
them (it shows a mess for a frame or two about the time the
"duplicated-as-0" frame is added).  When doing

  set video_filter=-ofps 24000/1001 -vf pullup,softskip,harddup

everything is fine.  Is there a possibility to "add harddup" to an avi
file WITHOUT re-encoding?  Or at least with re-encoding only chunks
where duplicated-as-0 frames are nearby?

Thanks,
Ilya